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(No Model.)

B. H. A. OAKLEY.

NUT LOOK. No. 381,578. Patented Apr. 24, 1888.

lnveniarx (3.1; 77Za/w n1/ UNITED STATES PATENT @rricnt EDWARD H. A.OAKLEY, OFAIKEN, SOUTH CAROLINA.

NUT LoCK.

SPECIFICATION forming part of Letters Patent No. 381,573, dated April24, 1888.

Application filed June 13, 188?.

To all whom it may concern:

Be it known that I, EDWARD H. A. OAKLEY, a citizen of the United States,residing at Aiken, in the county of Aiken, State of South Carolina, haveinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is aspecilieation, reference being had therein to theaccompanying drawings.

My invention relates to improvements in looking devices for bolts andnuts; and the objects of my improvements are to devise a simple,inexpensive, and efficient lock for the same, which will prevent themfrom becoming loose, and which can be readily applied, and also removedwith little trouble when desired, and is especially adapted for use tojoints of railroad-rails, and for this purpose the head of the belt orits nut has in the periphery thereof a series of grooves, and one orboth of the fish-plates of said joints have also grooves to receive atapering key to be placed and retained therein, as will be hereinafterdescribed in connection with the accompanying drawings, in which Figure1 is a side view of a railroad joint provided with fish-plates and anut-lock ,constrncted in accordance with my invention. Fig. 2 is atransverse vertical section of the same. Fig. 3 is a perspective view ofa bolt and nut constructed in accordance with myinvention. Fig. at is aperspective view of the key. Fig. 5 is a perspective view of a nutadapted to receive said key.

in the drawings, A. and A represent the ends of railroad-rails, and Bthe fish-plates uniting them. The latter have, besides the usualperforations, b, to receive the bolts D, used to connect the fish-plateswith the rails, other perforations or slots, b", radiating from theperforations b. Two of these slots are shown in this case, one beingshown at the highestpoi at of the perforations I) and the other at thelowest point; but the number of said slots may vary according tocircumstances. To retain the bolt connected to the parts united thereby,I prefer a nut, E, that cannot be turned with an ordinary wrench, andfor this purpose the outer face of said nut is semispherieal; but toprevent it from accidentaliy turning upon the bolt its inner or flatface is provided with spurs c, adapted to enter the Serial No. 241,172.(No model.)

slots Win one of the fish'plates. When the nut E is held in saidposition united to the fishplate, and the bolt D is inserted through thefish=plate, the rail, and the nut E, said bolt is I locked as follows:There is cut in the head D of said bolt, preferably in each cornerthereof, a groove, (1, to receive the locking-key F. Said groove isshallow at the outer end thereof, but, preferably, deeper at its innerend, so that the key will require but asmall slot, If, for the reception of its inner end, f, into the fish-plate. Its outer portion hasa shoulder, f, against which a suitable tool may be forced to drive thekey in its seat. The outer end,f' of the key is made thin, so that itssurface will be below the surface or sides of the head when in positionto lock the bolt. lVhen thus inserted, it is retained against removal byhitting the corners d of the groove a light blow or two witha hammer,and thus clinching its metal upon the end f of the key; but when it isdesired to unlock the bolt these clinched and upset portions of the nutcan easily be straightened with a suitable tool.

The locking-key has been described above as in engagement with the headof the bolt; but it is evident that it could be used to lock a nut, asG, Fig. 5, having its sides provided with grooves d of suitable size toreceive said key.

Having now fully described my invention, I claim-- The combination ofarail, fislrplates having perforations to receive bolts, and radial slotsleading from said perforations, with a nut and a bolt having a headprovided with grooves in its periphery, and a key adapted to enter theradial slots in the fish-plate and the grooves in the head of the bolt,the head or outer end of said key being less in height than the edges ofthe groove, whereby said head is wholly embedded in said groove andadapted to be retained therein by upsetting said edges over the key,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD H. A.

. OAKLEY.

